Did you check out the Advanced Setting dialogue yet? There's also a documentation of the possible settings here: https://github.com/minetest/minetest/bl ... nf.exampleIn this case you're probably looking for the setting hud_scaling = 2 , although more than just the hearts might be way too big. The scaling algorithm is far from perfect and has been an issue a few times already. Installing a 32px or 64px texture pack might give it a better appearance.